(x-45)/(x-24)=62.5%等于多少?
问题描述:
(x-45)/(x-24)=62.5%等于多少?
答
(x-45)/(x-24)=62.5%
x-45=0.625(x-24)
x-45=0.625x-15
x-0.625x=-15+45
0.375x=30
x=80